I put this problem here because one variation (the main variation) involves a tesuji for connecting stones.
This problem was posted to rec.games.go by Eric Osman (thanks Eric). Feel free to move this page to another section of SL.
Cheers -- Jonathan Cano
Note: If Black can connect the circle-marked group to the square-marked stone and White cannot keep Black from running into the center, then Black has succeeded for the purposes of this problem.
Here's the diagram without the distracting marks:
Hitachi Number Nine / Solution